20) Near Double
Doubling and Halving to 10: Strategy Fluency
Mathematics
To develop fluency using the strategy of near double addition, adding one more than the double bonds of 1, 2, 3, 4, 5.
Prior knowledge needed:
- Double 1, 2, 3, 4, 5 bonds
- The commutative property of addition: two parts can be added in any order without changing the size of the whole.
- The associative property of addition: three or more parts can be added in any order without changing the size of the whole.
Language
- double bond
- near double
- one more
- addition as “add”
- equals
Differentiation
A little easier
Sequence: step by step
Place Bond Blocks on the part-part-whole frame to calculate the near double part-part-part-whole bond. For example,
Working Memory Support: desk visual
Click to download the Double Bonds to 10 Part-Part-Whole Diagrams desk visual.
A little harder
Activity 63
Students who have completed up to Ten Plus Bonds: Addition and Subtraction Ten and One can complete a similar activity for wholes in the teens. Complete Activity 63 Doubling and Halving to 20: Near Double Strategy Fluency.
Progression
In the next chapter of activities students develop different partitions for wholes less than 10. Go to
Activity 21
Five Plus Bonds: Bonds Building A Wall